Afr 180cc Eliminator Sbc Bare Cylinder Heads, 75cc Chambers, Straight Plug, No Parts

AFR`s 180cc "Street" heads are a cost effective performance choice over re-worked factory heads. They feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings. Recommended for street, towing, or street/strip engines with displacements up to 383 cubic inches, operating up to 6000 RPM. Legal for 1994 and older emissions controlled vehicles under CARB EO #D-250-2. Machining options are available to customize AFR Heads to your specific build. Note: Head comes completely bare, no parts. *Notice Pictures are for reference heads would come bare, no parts.
The Small Port, High Velocity Torque Monster! - Information below is referring to fully assembled heads.
The AFR Emissions Legal (versions from 1969-94 with heat riser, CARB EO #D-250-2), 180cc intake port small block Chevy cylinder heads are available in your choice of straight or L98 angle plug versions. These cylinder heads feature a 75cc or 65cc combustion chamber with a 64cc exhaust port and a 3/4" thick head deck (ideal for nitrous or blower applications.) Standard valves are lightweight 8mm 2.020 intake and 1.600 exhaust with AFR's hardened ductile iron interlocking valve seats. The exceptional flow characteristics, ideal operating range of idle to 5500 rpm (higher rpm ranges possible depending on combination of parts), 23? valve angle, and standard valve spacing make this the perfect street aluminum cylinder head for 327 cid to 350 cid engines from 1955-86. Also available for 1987 to present engines with center bolt valve covers and 2 center intake bolts at 72? angle, AFR Part #0919. No special parts are required. Vortec style cylinder heads available also, AFR Part #0912. Drilling for centerbolt valve covers available as an option.
The exhaust ports are raised .100" over a standard GM L-98 cylinder head.

Note:
Hydraulic roller cams typically experience valve float at 6000-6200 rpm because of their fast ramp rates. AFR suggests you upgrade your springs to AFR part #8019, 1.270 O.D. with higher spring pressures to reduce chances of valve float associated with rpm's 6200 or higher, but smaller cams with less than .500 lift can rev to 6500 rpm with the included springs. Basic Package Components Part # 100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-angle Valve Job  
Specifications, Features, and Optional Supporting Components Head Material A356 Aluminum Intake Port Volume 180cc Intake Port Dimension 2.050" H x 1.250" W x 5/16? Radius Intake Port Location Stock Exhaust Port Volume 64cc Exhaust Port Dimension 1.450" H x 1.550" W Exhaust Port Location .100" Raised Combustion Chamber Size 65cc or 75cc Valve Cover Bolt Pattern Perimeter Bolt Valve Angle 23? Valve Spring Pocket Diameter 1.460" O.D Max Valve Spring Pocket Machining 1.750" O.D Deck Thickness .750" Minimum Bore Diameter 4.000" Flat Mill .006" per cc 60cc Maximum Angle Mill .009" per cc 55cc Maximum Minimum Cross Sectional Area 1.810 sq. in. Note:Angle mills might require a .120" Thick intake gasket. Spark Plug Dimensions 14mm x .750" w/Gasket Seat Carb EO# D-250-23 Exhaust Port Gasket, Fel-Pro #1404 AFR #6834 Head Gasket, 350cid Fel-Pro #1003 AFR #6800 Head Gasket, 400cid Fel-Pro #1014 AFR #6802 SB Chevy Head Bolt Kit, ARP #134-3701 AFR #6310 SB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301 AFR #6305 Head Bolt Washers, Manley AFR #6320 Stud Girdle GM L98 AFR #6200 Suggested Manifold AFR DPR #4804 Spark Plug Starting Range Autolite 3924 Important: Do not port match you intake manifold to any Fel-Pro gasket as it does not precisely match AFR heads.
Note: Milling head deck will affect flow numbers.